Abstract: The upcoming 3rd telecommunication telephony generation is setting forth a new set of challenges in the development and deployment of numerous telecom services which follow the requirements and expectations of end-users. This paper describes our approach to provide the user with an environment to set up his own preferences when using such multimedia telecom services. Our purpose is to keep services, profiles and behaviors unchanged and just compose them in a safe way in purpose to generate added value services that answer to the end user expectations. The first implementation is provided and tested on web applications where we integrate the user profiles with no modification on the XML document. In particular we describe how we adapt the representation according to the end-user requirements. Then we extend our approach to a more flexible system. Our purpose was to provide an environment for end-user QoS control of multimedia telecom services that integrate behaviors as well as profiles. We also present our evaluation of the approach that has been realized and the future study.